port from perforce

intromat/Intromat/Nodes/DxNodeBase.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Reactive;
+using System.Reactive.Linq;
+using DynamicData;
+using Intromat.ViewModels;
+using NodeNetwork.Toolkit.ValueNode;
+using NodeNetwork.ViewModels;
+
+namespace Intromat.Nodes
+{
+    public abstract class DxNodeBase : CodeGenNodeViewModel
+    {
+        protected DxNodeBase()
+            : base(NodeType.Literal)
+        {
+            AnyInputChanged = Inputs
+                .Connect()
+                .Filter(input => input is ValueNodeInputViewModelBase)
+                .WhenValueChanged(input => ((ValueNodeInputViewModelBase)input).UnitValueChanged)
+                .SelectMany(i => i!);
+
+            AnyInputChanged.Subscribe(_ => { });
+            Resizable = ResizeOrientation.HorizontalAndVertical;
+        }
+
+        public IObservable<Unit> AnyInputChanged { get; }
+    }
+}